摘要
为了明确外源水杨酸(Salicylic acid,SA)提高蔬菜作物抗盐的生理生化机制,以辣椒(Capsicumfrutescens L.)为材料,在150 mmol.L-1 NaCl胁迫条件下,采用叶面喷施法,研究了不同浓度外源SA对幼苗形态建成及其生理生化特性的影响。结果表明,外源SA能够显著提高幼苗的株高、展开叶片数、茎粗、植株鲜重及干物重以及壮苗指数,明显降低丙二醛(MDA)含量,显著提高游离脯氨酸、可溶性蛋白含量及超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)酶活性。其中,SA浓度为200 mg.L-1时作用效果最明显。
In order to clarify the physiological and biochemical mechanism of exogenous salicylic acid in improving the tolerance of crops to salt stress,an experiment of pepper（Capsicum frutescens L.） was established.In the paper,the effects of different concentrations of exogenous salicylic acid with foliar spray on morphogenesis,physiological and biochemical characteristic under 150 mmol.L-1 NaCl stress was studied.Results showed that exogenous salicylic acid significantly improved stem height,number of leaves,stem diameter,fresh and dry weight and healthy index,markedly decreased the content of malon-dialdehyde（MDA）,increased contents of free proline,soluble protein and activities of protected enzymes such as superoxide dismutase（SOD）,peroxidase（POD） and catalase（CAT）.In different SA treatments,200 mg.L-1 SA was considered to be the optimum one.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2010年第11期32-37,共6页
Journal of Northeast Agricultural University
基金
湖北省自然科学基金(2008CDB087)
关键词
辣椒
水杨酸
盐胁迫
生理效应
pepper
salicylic acid
salt stress
physiologicaleffect
